economy. the moves come after "the washington post", "the new york times" and "the wall street journal" announced recent attacks on their computer systems suspected of original senating from china. social media site twitter as you say said friday dreamly sophisticated hackers from an unidentified source may have stolen the user names, e-mail addresses and passwords of 250,000 customers. now the u.s. has made little progress in negotiations with the chinese to stop this kind of hacking. now the u.s. is considering new economic and diplomatic steps to prevent it and according to "the financial times", more information-sharing between washington and private companies to protect critical systems and infrastructure like power grids and communications systems. >> we, you know, have had and been very clear about our substantial and growing concerns about the threats of economic to economic national security posed by cyber intrusions including the theft of commercial information. we have been clear wi